Glass-cutter



J. R. SCOHY.

GLASS CUTTER.

APPLICATION FILED MAY 6, 1920.

Patented Nov. 23, 1920.

[ VVE'NTU earner orsics.

;ro1-I1\i n. 'sooHY, or OKMULGEE, OKLAHOMA.

GLASS-CUTTER.

Specification of Letters Patent. Patented NOV. 23, 1920.

Application filed May 8, 1920. "Serial No. 279,286.

T 0 all wit-0m may concern: 7 Be it-known that 1, JOHN citizen of theUnit-ed States, and a resident of Okmulgee, county of Okmulgee, andState of :Gklahoma have made an Invention Appertainingeto(itlassCutters; and I do hereby declare the following to be a full,clear, and exact description of theinvention, such as will enable-othersskilled in the art to which it appeartains'to make and use the same,reference being. had to" the accompanying-drawings, and tothe charactersof reference marked thereon, which form a part of this specification.

My invention relates to means for cutting glass. It may be used forcutting glass cyl-.' inders, commonly formed in the manufacture ofwindow glass or it may be used in cutting plate glass, that is, after.the cylinders have been flattened out. The cutter may be used forcutting glass in any form or shape. The cutter may be sup ported in anysuitable way for convenience of manipulation to cut glass of any form.Cutter containing my invention may partake of different forms. T 0 showthe practical application of my invention 1 have shown the cutters inposition for cutting a glass cylinder. The structure selected forpurpose of illustration is shown in the accompanying drawings.

Figure 1 of the drawings is aside view of the cutter showing the cutterin position about a glass cylinder. Fig. 2 shows side and edge views ofone of the disks that form a means for heating the glass along adefinite line. Fig. 3 is an enlargedview of a plurality of the disks,somewhat exaggerated, to illustrate the manner in which the arcs formedbetween the disks shown in Fig. 2 will lie close to the surface of theglass cylinder. Fig. 4c is an end view of the the means for connectingthe cutter with a source 01" current supply and for keeping the ends ofthe cutter separated and insulated from each other when the cu ter isused for cutting a glass cylinder. Fig. 5 is a side view ot the deviceillustrated in Fig; 4.

1, Fig. 1 of the drawings. is the glass cylnder to be cut by the cutterembodying my invention. 2 is the cutter. It consists of a flexible cable3 preferably of wire on which is strunc a pluralit of disks 4 havingopen- R. Scorn, a

., closest contact with each other. produce a series ofarcsrunningaround the that when the isv drawn about the.

glass cylinder or when by a suitable means the lower portions ofthedisks a, particularly near the edges 6, are forced together, theportionsof the edges 6 in contact with the glass cylinder or, in the other casein contact with the glass plate, will be in close contact with eachother, while the outer or upper rim portions of thedisks will 7 beslightly separated or at any rate the contact will not be as close asalong the-line of the disks. where they. rest against the glasscylinder, a glass plate or any other glass article or-object. It then,acurrent of electricity is directed through the disks it will pass, atleast in greater part, along the line of least resistance, which willbe'along the linewhere the edges ,6 of the disks make cylinder or alongthe plate of glass or other object and in close proximity or incontactwith the glass which will cut the glass along the line ofcontactbetween-the 'cutter and the glass. r The disks or beads 4 may beconnected with a source of current supply by any suitable means. In thedrawing Ihave illustrated a block 8 of insulating material which may beconnected to the cutter when the cutter is used for cutting a glasscylinder. The

lower edge 9 of the block 8 conforms substantially to the curvature ofthe cylinder to be cut. A mica strip 10 is suitably secured in theinsulat ng block 8. If desired,

the insulating block 8 may be formed of two parts and the mica strip 10may be secured This will between the two parts. The lower edge of themica strip 10 also conforms to the curvature of the cylinder. Contacts11 may be secured on opposite sides and at the opposite ends of theblock 8. Thecontacts extend below the block 8 and on opposite sides ofthe mica strip 10. and at a distance from the mica strip ]0 sufficientto permit the disksd to be placed between the mica strip and thecontacts 11 and yet make good contact with the contacts 11. The contacts11 thus may be made of spring material and may be so formed that theyslope outward slightly from the block 8. A source of current sup-- plyis connected with the contacts ll'by means of wires that extend throughthe block 8. The source of current supply may be connected by means ofthe switch 12 to the contacts 11. When a cylinder is to be tacts 11'.

cut by means of the cutter, the cutter is placed around the cylinder anddrawn against the cylinder. The end portions of the cutter overlap andare placed close to the mica strip 10 and against the contacts 11,

that is, between the mica strip 10 and the con- By reason of the factthat the will form a series ofarcs between thedisks along the surface ofthe glasscylinder'which will heat the glass along this line and fractureor cut 'theglass along this definite line.

Where the cutter is to be usedv for cutting plate glass, the disks maybetightly pressed. together on their lower sides by any suitable meansto cause closer contact along the edges of the disks in contact with theglass which willpwhen the current passes throughthe disks, produce thesame results and out along the line of contact. of the cutter with theglass.

The disks may be formed of any suitable material which will operate tolocalize the heat produced by the current, that is,'to localize thecurrent itself'and subject the curlfIn a glass cutter, a plurality ofmembers placed in juxtaposition along the line of contact between thecutter and the glass, and means Y for' connecting the members toa sourceof current supply. I

2. In a glass cutter, a plurality of beadlike members, means forconnecting the members to a source of current supply.

3. In a glass cutter,. a. plurality of disk shaped members placed insuccessive juxtaposition with one another, and means j for connecting asource of current supplywith the members.

I. In a cutter, a cable, a plurality of disks threaded on the cable,means forconnecting the disks with a source of current supply.

5; In acutter, a plurality of'members, means for causing the members tomake closer contact along oneside of the members than on the'other'side'of the members, and means for connecting: the members to a sourceof current supply.

6; In a cutter, a plurality of disks, means for drawingdlsks togetherand causingthe disks to make closer contact on one side than I on theother side, and means for connecting the disks with a source of currentsupply.

In testimony whereof I have hereunto signed my name to this secification.

JO IN E. SCOHY.

